Tasks: arithmetic operations in C ++

1. Common task: Given the four-digit number (for example 5678), display the numbers in reverse order of which is the number of member. That is, we should see on the screen 8765. Tip: to take from among the individual numbers, should be applied to the modulo 10.

Show code

C++

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#include <iostream>

usingnamespacestd;

intmain()

{

setlocale(LC_ALL,"rus");

intmainNumber=5678;

cout<<"Дано целое число: "<<mainNumber<<endl;

cout<<"Число наизнанку: ";

// остаток от деления четырехзначного числа 5678 на 10

cout<<mainNumber%10;// 5678 % 10 = 8

// далее делим mainNumber на 10 и записываем в переменную

// так как тип переменной int, дробная часть отбросится

// и mainNumber будет равен 567 (а не 567,8)

mainNumber/=10;

// показываем остаток от деления 567 на 10 на экран

cout<<mainNumber%10;

mainNumber/=10;

cout<<mainNumber%10;

mainNumber/=10;

cout<<mainNumber%10;

mainNumber/=10;

cout<<endl<<endl;

return0;

}

Result:

[crayon-5c1a0c40092ae998519380/]

Result:

2. The site of almost any commercial bank, you can find the so-called Deposit calculator, which allows people to, not wishing to go into the formula for calculating interest rates, to know how much they will receive. To do this, they just fill in certain fields, press the button and see the result. This is a simple program, which has already been able to write each one of you. So, a task: The user enters the amount of the deposit and the number of months of keeping money in the bank. It is necessary to calculate and show the screen profit from the deposit in a month, for the entire term of the deposit, and the total amount payable at the end of the period. Currency let it be – U.S. dollar. Interest rate – 5% APR. The formula for calculating percent per month – SumDeposit * (interest rate / 100) / daysperyear * dayspermonths.

Show code

C++

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#include <iostream>

usingnamespacestd;

intmain()

{

setlocale(LC_ALL,"rus");

floatsumDeposit=0;// сумма депозита

intamountMonth=0;// количество месяцев

floatprofit=0;// прибыль

floatannualRate=5;// пять процентов годовых

intdaysInYear=365;

intdaysInMonth=30;

cout<<"Введите сумму депозита в долларах: ";

cin>>sumDeposit;

cout<<"Введите количество месяцев: ";

cin>>amountMonth;

cout<<"\nРасчет\n";

cout<<"=======================================\n";

cout<<"Проценты в месяц: ";

// проводим расчет по формуле и записываем в переменную profit

profit=sumDeposit*(annualRate/100)/daysInYear*daysInMonth;

cout<<sumDeposit<<" * "<<annualRate<<"% / "<<daysInYear

<<" * "<<daysInMonth<<" = "<<profit<<" $"<<endl;

cout<<"Проценты за весь срок: ";

// умножаем % за 1 месяц на весь срок депозита и записываем в profit

profit*=amountMonth;

cout<<profit<<" $"<<endl;

cout<<"Общая сумма выплаты в конце срока: "

<<sumDeposit+profit<<" $";

cout<<endl<<endl;

return0;

}

Result:

[crayon-5c1a0c40092bb763869663/]

Result:

Perhaps you have any questions about the solution of tasks – ask them in the comments! Catch!

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